Weak- and hyperfine-interaction-induced 1s2s 1S0 -1s2 1S0 E1 transition rates for the isoelectronic sequence of He-like
ions have been calculated using the multiconfiguration Dirac–Hartree–Fock (MCDHF) and relativistic configuration
interaction methods. The results should be helpful for the future experimental investigations of parity non-conservation
effects.